HK1071982A1 - Magnet assembly for loudspeakers. - Google Patents

Magnet assembly for loudspeakers.

Info

Publication number
HK1071982A1
HK1071982A1 HK05104656A HK05104656A HK1071982A1 HK 1071982 A1 HK1071982 A1 HK 1071982A1 HK 05104656 A HK05104656 A HK 05104656A HK 05104656 A HK05104656 A HK 05104656A HK 1071982 A1 HK1071982 A1 HK 1071982A1
Authority
HK
Hong Kong
Prior art keywords
loudspeakers
magnet assembly
magnet
assembly
Prior art date
Application number
HK05104656A
Inventor
Graham Bank
Original Assignee
New Transducers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of HK1071982A1 publication Critical patent/HK1071982A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
HK05104656A 2002-10-10 2005-06-02 Magnet assembly for loudspeakers. HK1071982A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0223654.5A GB0223654D0 (en) 2002-10-10 2002-10-10 Electromagnetic actuator
PCT/GB2003/004385 WO2004034737A1 (en) 2002-10-10 2003-10-09 Magnet assembly for loudspeakers

Publications (1)

Publication Number Publication Date
HK1071982A1 true HK1071982A1 (en) 2005-08-05

Family

ID=9945733

Family Applications (1)

Application Number Title Priority Date Filing Date
HK05104656A HK1071982A1 (en) 2002-10-10 2005-06-02 Magnet assembly for loudspeakers.

Country Status (6)

Country Link
US (1) US7197155B2 (en)
CN (1) CN100579292C (en)
AU (1) AU2003278307A1 (en)
GB (2) GB0223654D0 (en)
HK (1) HK1071982A1 (en)
WO (1) WO2004034737A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060239496A1 (en) * 2005-04-25 2006-10-26 Stiles Enrique M Magnetically tapered air gap for electromagnetic transducer
US7576954B2 (en) * 2006-02-16 2009-08-18 Sae Magnetics H.K. Ltd. Symmetric voice coil motor design, assembly methods of constructing same, and hard disk micro drive storage systems including same
US7705702B2 (en) 2006-08-08 2010-04-27 Selex Galileo Ltd Actuator
GB2440768A (en) * 2006-08-08 2008-02-13 Selex Sensors & Airborne Sys Magnet assembly for moving coil actuator
DK1962551T3 (en) * 2007-02-20 2014-07-14 Sonion Nederland Bv Sound transmitter with movable luminaire
CN101884226B (en) 2007-09-26 2016-10-19 哈曼贝克自动系统制造有限责任公司 Acoustic transducer and operational approach thereof
EP2114086B1 (en) * 2008-04-30 2012-12-26 Renault S.A.S. Ironless and leakage free coil transducer motor assembly
EP2139265A1 (en) * 2008-06-23 2009-12-30 Focal-Jmlab (Sa) Motor for a tweeter
KR200454507Y1 (en) * 2009-06-22 2011-07-08 주식회사 비에스이 Micro speaker
DE102009048866A1 (en) * 2009-08-27 2011-03-03 Bösnecker, Robert, Dr. Device for vibration stimulation of diaphragms or diaphragm-type materials showing frequencies in audio range of humans, has electrical change signal partly converted in mechanical motion, where converter possess hole or opening
FR2960738B1 (en) * 2010-05-28 2015-09-25 Focal Jmlab ACOUSTIC SPEAKER
KR101208243B1 (en) * 2011-04-28 2012-12-04 주식회사 비에스이 Slim type speaker and magnetic circuit for it
US9232306B2 (en) 2012-06-10 2016-01-05 Apple Inc. Systems and methods for reducing stray magnetic flux
US9699565B2 (en) * 2014-12-07 2017-07-04 Cardas Audio Ltd. Loudspeaker using contour field hard magnet poles and yoke construction
DE102015201940A1 (en) * 2015-02-04 2016-08-04 Sennheiser Electronic Gmbh & Co. Kg Electrodynamic transducer
US11245986B2 (en) * 2019-10-24 2022-02-08 Bose Corporation Electro-magnetic motor geometry with radial ring and axial pole magnet

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE440964A (en) 1939-10-05
NL112264C (en) * 1960-05-10
NL6700283A (en) * 1967-01-07 1968-07-08
SU711704A1 (en) 1974-02-18 1980-01-25 Melnikov J A Loudspeaker head magnetic system
JPS5272216A (en) 1975-12-12 1977-06-16 Nippon Telegr & Teleph Corp <Ntt> Magnetic circuit for speakers
US4295011A (en) * 1979-09-11 1981-10-13 Epicure Products Inc. Linear excursion-constant inductance loudspeaker
AU672953B2 (en) * 1991-08-05 1996-10-24 Speaker Acquisition Sub Voice coil actuator
JPH09238395A (en) * 1996-02-29 1997-09-09 Sony Corp Speaker equipment
NO975614A (en) 1997-12-04 1999-04-26 Seas Fabrikker As Permanent magnet assembly

Also Published As

Publication number Publication date
US7197155B2 (en) 2007-03-27
WO2004034737A1 (en) 2004-04-22
CN100579292C (en) 2010-01-06
GB0223654D0 (en) 2002-11-20
AU2003278307A1 (en) 2004-05-04
US20060165251A1 (en) 2006-07-27
GB2408167A (en) 2005-05-18
GB2408167B (en) 2005-08-10
CN1703931A (en) 2005-11-30
GB0504898D0 (en) 2005-04-13

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20131009